Craft help!

heey, i dunno if this fits in this section or even this forum,, but i was wondering if any one of you could help me with a christmas gift/craft idea!
i was plannin on making my girlfriend a music box/jewellery box type thing. What i wanted to do was rig up the jewellery box so that when you opened it, it would play music. do you guys have any idea how i could go about doing this with using a voice recording module. I was planning on installing it into the bottem of the music box, and cover it with like a speaker foam so that the necklace could lay on that. but how would i make it so that the music plays when it opens? any ideas on design or anything? i dont really know waht im doing so any advice is great!! thanks !